KR20150137637A - a color coating composition same and using for color coated glass diffuser for LED light diffuser - Google Patents

Abstract

The present invention relates to a color coating composition for an LED lamp diffuser using glass frits and a color-coated glass using the same. The color coating composition increases durability and lifespan of an LED lamp, satisfactorily maintains an external appearance and a lighting quality for a long time, and implements various colors, by manufacturing a glass-made diffuser as a means for diffusing light of the LED lamp in a manner of coating the diffuser on various sheets of transparent or translucent glass such as tubes and bulbs so that the diffuser is not deformed and discolored by light and heat, and does not lower strength and translucency.

Description

A color coating composition for an LED light diffuser using glass frit and a color coating composition using the same,

The present invention relates to a color coating composition for an LED light diffuser using glass frit and a color coated glass using the same, and more particularly, to a color coating composition for a LED light diffuser by coating a transparent or semi- By making it possible to manufacture diffusers of glass materials that do not suffer from deformation and discoloration due to heat, degradation of strength and light transmittance, it is possible to improve the durability and lifespan of LED lamps and improve the color of various colors The present invention relates to a color coating composition for an LED light diffuser using a glass frit and a color coated glass using the same.

In addition to illuminating the dark, lighting is used for various purposes such as decoration, visual display and so on. In the past, lamps using filaments such as incandescent lamps and fluorescent lamps were mainly used. Since these lamps emit a considerable portion of the power they consume, the energy used for actual lighting is only about 5 to 30% The energy efficiency is very low, and the service life is short.

As a result, recently, LED lamps using LEDs as light sources with low power consumption and long lifespan are attracting attention. Generally, LED lamps can reduce energy consumption by less than 1/5 of that of incandescent lamps and 1/3 or less of fluorescent lamps, and have a lifespan of more than 100 times that of incandescent lamps and more than 10 times that of fluorescent lamps . The LED lamps currently being marketed are similar in appearance to conventional lamps, such as incandescent lamps and fluorescent lamps, so that the existing lighting fixtures can be used as they are. For example, a fluorescent lamp type LED lamp is shown in FIG. 1 have.

As shown in the figure, a conventional LED lamp includes a substrate 23 on which a plurality of LEDs 21 are arranged on the inner side of the main body 10, and a cover 30, which covers the front side of the LED 21, (10). On both sides of the main body 10, connection pins for supplying power to the LEDs 21 are provided and can be connected to a fluorescent lamp in a similar manner to conventional fluorescent lamps.

In general, since LEDs are point light sources with a narrow illumination angle, a diffuser is required to diffuse the light of LEDs to a wide area in order to prevent glare and provide uniform illumination. For this reason, the cover 30 is made of a diffuser 30 made of a synthetic resin material having a light diffusing property by adding a diffusing agent to a polycarbonate (PC) instead of a simple light emitting material.

In addition, since the LED is vulnerable to heat, when the temperature exceeds the proper operating temperature, the performance is drastically reduced. Therefore, a heat sink capable of rapidly discharging heat generated when the LED is driven is required. The heat resistance of the LED is improved and the operating temperature is reduced according to the development of the technology. However, since heat dissipation can not be effectively performed through the synthetic resin diffuser 30, a heat sink is required in the conventional LED lamp . In addition, since the diffuser 30 itself is very vulnerable to heat, the necessity of a heat sink is inevitably higher. Accordingly, the main body 10 is made of a heat sink 10 made of a metal material such as aluminum.

As described above, the conventional LED lamp has a structure in which the diffuser 30 made of synthetic resin and the metal heat sink 10 are combined.

However, since the conventional LED lamp is made of a synthetic resin material that is susceptible to heat and light (particularly ultraviolet rays), the diffuser 30 can be prevented from being damaged by the heat and light generated during operation of the LED 21, The diffuser 30 is deformed and discolored due to the heat and light applied to the light and the ambient light, and the strength and the light transmittance are lowered, resulting in poor lighting quality and appearance of the product in a short period of time, have.

In addition, since the structure of the conventional LED lamp requires the heat sink 10 and the diffuser 30 separately manufactured and assembled, the metal heat sink 10 requiring a large amount of material and processing cost is required, There is a problem that the productivity is low and the manufacturing cost is high.

Although not illustrated separately, other types of LED lamps including a bulb-type lamp also have the same problems as described above because they have a structure in which a metal heat sink and a synthetic resin diffuser are combined.

The object of the present invention is to improve the above-mentioned conventional characteristics, and it is an object of the present invention to provide a light diffusion method for an LED lamp by coating various transparent or semitransparent glass such as a tube and a bulb, And a glass frit which can realize various colors of colors that can improve the durability and lifespan of the LED lamp and maintain good appearance and illumination quality for a long time by making it possible to manufacture a diffuser of a glass material free from decrease in light transmittance A color coating composition for a light diffuser and a color coated glass using the same.

The present invention has the following structure in order to achieve the above object.

In the color coating composition for an LED light diffuser of the present invention, the color coating composition is formed by mixing a binder solution, a glass frit, a ceramic filler and an inorganic pigment at a predetermined ratio.

The color coating composition is prepared by mixing the binder solution, the glass frit, the ceramic filler and the inorganic pigment in an amount of 50% by weight, 40 to 44% by weight, 5 to 8% by weight and 1 to 3% by weight, respectively.

The inorganic pigments may also contain C.I. Pigment Red 108, Cadmium zinc sulfide, C.I. Pigment Green 50 and C.I. Pigmert Blue 28. < / RTI >

Each of the inorganic pigments is mixed in an amount of 1 to 5% by weight.

The binder solution is composed of an organic binder and a solvent. The organic binder is selected from nitrocellulose, acryl resin, and ethyl cellulose. The solvent is selected from the group consisting of toluene, acetone, isobutyl acetate, butyl cellosolve, and xylene. Any one or at least one selected is included.

The color coating composition is composed of silicon dioxide, boron oxide, zinc oxide, and barium oxide as main components of the glass frit.

The main components of the glass frit are each composed of 9 to 17% by weight, 18 to 20% by weight, 41 to 46% by weight and 9 to 17% by weight.

The glass frit further contains one or more selected from among potassium oxide, sodium oxide, and aluminum oxide having a composition ratio of 1 to 11% by weight.

The ceramic filler includes any one selected from calcium carbonate, calcium oxide, calcium fluoride, titanium dioxide, silicon dioxide, zinc oxide, aluminum oxide and magnesium oxide.

The ceramic filler is contained in an amount of 8 to 12% by weight depending on the composition ratio of the organic frit.

Meanwhile, a manufacturing method for producing a coating composition for an LED light diffuser of the present invention comprises the steps of: 1) forming a glass frit of powder; 2) mixing the powdered glass frit and the ceramic filler in the organic binder solution at a constant ratio; And 3) a step of mixing and simultaneously pulverizing the mixed composition for a predetermined time through the step 2) to form a coating liquid.

Also, the step 3) is performed in a state where the ball mill is provided in the blender.

The step 3) is performed at room temperature for 30 minutes, and in the step 3), the ceramic filler is preferably pulverized to have a particle diameter of 2 to 4 탆.

In addition, the step 1) may include a step of mixing the glass frit materials at a constant composition ratio to form a mixed material, a step of melting the mixed material using a melting crucible, a step of clarifying and cooling the molten mixed material, And wet grinding the glass obtained through the purifying and cooling processes.

The melting process is performed at 1200 DEG C for 30 minutes, and in the wet grinding process, the glass frit is pulverized to a particle diameter of 2 to 4 mu m.

Meanwhile, the coated glass of the present invention is coated using a coating composition for an LED light diffuser, and the coated glass is preferably coated with a coating composition between 10 and 20 탆.

The coated glass is raised from room temperature to 500 to 600 ° C at a rate of 5 ° C per minute and then held for 5 minutes and then cooled and cured.

The present invention can be applied to various transparent or translucent glass such as tubes and bulbs to make a diffuser of a glass material free from light and heat distortion, discoloration, It is possible to improve the durability and lifespan of the LED lamp and realize various colors of colors that can maintain good appearance and illumination quality for a long period of time.

1 shows a conventional LED lighting.
FIG. 2 is a perspective view showing application to a fluorescent lamp type light source as an embodiment of an LED electric light diffuser according to the present invention. FIG.
Fig. 3 is a cross-sectional view of the LED lamp shown in Fig. 2; Fig.
4 is a perspective view showing an LED light diffuser according to another embodiment of the present invention applied to a light bulb type light source.
5 and 6 are block diagrams showing a method for producing a coating composition for a diffuser according to the present invention.
Figs. 7 and 8 are photographs showing the calcined coated glass produced by the present invention. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

It is to be understood that the following specific structure or functional description is illustrative only for the purpose of describing an embodiment in accordance with the inventive concept, and that the embodiments according to the concept of the present invention may be embodied in various forms, It should not be construed as being limited to examples.

Since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

The terms first and / or second etc. may be used to describe various components, but the components are not limited to these terms. The terms may be named for the purpose of distinguishing one element from another, for example, without departing from the scope of the right according to the concept of the present invention, the first element being referred to as the second element, The second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when it is mentioned that an element is "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It will be understood that the terms "comprises", "having", and the like in the specification are intended to specify the presence of stated features, integers, steps, operations, elements, parts or combinations thereof, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

2 and 3, the diffuser 116 of the present invention is formed by being applied to an inner surface of a long tubular shape having a circular cross-sectional shape, similar to a glass tube 111 forming a conventional fluorescent lamp.

An LED 115 is disposed inside the glass tube 111 and a base 112 having a connection pin 113 is coupled to both longitudinal ends of the glass tube 111. The LED lamp 110 having an appearance similar to a fluorescent lamp ) Can be produced.

Like a typical LED lamp, a plurality of LEDs 115 are arrayed on the substrate 114 and connected to the connection pin 113 through the substrate 114.

When the connection pin 113 is connected to the power terminal of a conventional lamp and power is supplied, the LED 115 emits light and the light of each LED 115 passes through the diffuser 116 applied to the glass tube 111 So that the light can be diffused and uniformly illuminated without glare.

Further, the heat generated by the operation of the LED 115 can be emitted to the outside through the glass tube and the diffuser 116.

A heat transfer medium 117 made of a common material having a high thermal conductivity such as metal or silicon may be provided between the back surface of the substrate 114 and the inner circumferential surface of the glass tube 111 for effective heat dissipation.

On the other hand, the shape of the illustrated glass tube 111 is merely an example, and may be a U shape, an L shape, a curved shape, a circular shape, or the like that is connectable to one or more end portions in addition to a linear shape so as to be connectable to a common luminaire of various structures It can be formed into various tube shapes. In addition to the tube shape, a diffuser may be coated on the inner circumferential surface of the glass bulb 121 of various shapes so as to be used for the bulb-type LED lamp 120 as shown in FIG. 4 also has a structure in which a base 122 for power supply connection is coupled to one side of a bulb-type diffuser 121, and a plurality of LEDs 125 are arranged in the substrate 124 in the inside. In the following description, the reference numerals of the diffusers are denoted by "116 ".

The diffuser 116 is made of a coating composition as described below to satisfy the physical and chemical properties required for the diffuser 116, including light transmittance, chromaticity, haze, heat resistance,

The haze value is expressed as a percentage by dividing the diffuser transmittance by the total transmittance. The higher the value, the more scattered light due to diffusion without the transmission of the direct light from the light source do.

Therefore, the Haze value of 100% means that all transmitted light is made to diffuse light, which is highly desirable for a diffusion material for illumination.

On the other hand, the parallel transmittance is a value obtained by subtracting the diffusion transmittance from the total transmittance and means the transmittance by the direct light, which means that the higher the value, the higher the glare caused by the direct light.

Also, if the total light transmittance is too low, the intensity of the light is disturbed. If the distance between the LED light source and the diffuser diffuser is too short, the internal light source device and the module itself are advanced, so the total light transmittance value is 50 ~ 85% Do.

Since the turbidity value and the parallel transmittance can be maintained to be constant as described above, the present invention can ideally fulfill the function of the diffuser. Accordingly, the present invention provides a composition that can ideally satisfy both turbidity and transmittance, a method for manufacturing the composition, and a diffuser Will be described.

In the present invention, the color coating composition is formed by mixing a binder solution, a glass frit, a ceramic filler and an inorganic pigment at a predetermined ratio.

The color coating composition is prepared by mixing the binder solution, the glass frit, the ceramic filler and the inorganic pigment in an amount of 50% by weight, 40 to 44% by weight, 5 to 8% by weight and 1 to 3% by weight, respectively.

The inorganic pigments may also contain C.I. Pigment Red 108, Cadmium zinc sulfide, C.I. Pigment Green 50 and C.I. Pigmert Blue 28. < / RTI >

Each of the inorganic pigments is mixed in an amount of 1 to 5% by weight.

The binder solution is composed of an organic binder and a solvent. The organic binder is selected from nitrocellulose, acryl resin, and ethyl cellulose. The solvent is selected from the group consisting of toluene, acetone, isobutyl acetate, butyl cellosolve, and xylene. Any one or at least one selected is included.

The color coating composition is composed of silicon dioxide, boron oxide, zinc oxide, and barium oxide as main components of the glass frit.

The main components of the glass frit are each composed of 9 to 17% by weight, 18 to 20% by weight, 41 to 46% by weight and 9 to 17% by weight.

The glass frit further contains one or more selected from among potassium oxide, sodium oxide, and aluminum oxide having a composition ratio of 1 to 11% by weight.

The ceramic filler includes any one selected from calcium carbonate, calcium oxide, calcium fluoride, titanium dioxide, silicon dioxide, zinc oxide, aluminum oxide and magnesium oxide.

The ceramic filler is contained in an amount of 8 to 12% by weight depending on the composition ratio of the organic frit.

Preferably, each of the compositions of the color coating composition is formulated with the proportions indicated in the tables below. This is because each component ratio provides optimal results.

Considering that the heat distortion temperature of soda lime glass is around 620 캜, it is necessary to coat the glass at a temperature lower than the glass deformation temperature.

For example, the composition and composition ratio of the glass frit and the ceramic filler are very important to obtain the turbidity and transmittance of the color coating composition coated on the glass by using an organic binder in the glass while preventing deformation of the glass during firing, ≪ / RTI >

Methods for making such a color coating composition include 1) forming a glass frit of powder (SlOO); 2) mixing powder glass frit, ceramic filler and inorganic pigment in an organic binder solution at a constant ratio (S200); And 3) a step S300 of forming the coating liquid by mixing and simultaneously pulverizing the mixed composition for a predetermined time through the step 2).

That is, the color coating composition of the present invention is prepared using compositions of the above-mentioned color coating composition.

Step 3) S300 is performed in a state where a ball mill is provided in the blender, and the milling is performed at room temperature for 30 minutes to form a ceramic filler having a particle diameter of 2 to 4 μm.

The first step S100 may include a step S110 of mixing the glass frit raw materials at a constant composition ratio to form a raw material mixture, a step S120 of melting the raw material using the melting crucible S120, (S130) of cooling and cooling the glass obtained through the cooling and cooling process (S140).

The melting step (S120) is performed at 1200 DEG C for 30 minutes. In the wet grinding step (S140), the glass frit is preferably pulverized to have a particle diameter of 2 to 4 mu m.

For example, in the manufacturing method of the present invention, a ceramic filler, a glass frit, and an inorganic pigment are mixed with an organic binder solution to form the glass frit, followed by mixing an inorganic pigment and a ceramic filler with an organic binder. Are shown in Table 1 below.

division Manufacturing example a b c d e f SiO ₂ (wt%) 17 9 13 15 17 16 B ₂ O ₃ (wt%) 20 20 20 18 18 19 ZnO (wt%) 42 42 46 42 42 41 BaO (wt%) 9 17 9 13 11 12 K ₂ O (wt%) 3 3 Na ₂ O (wt%) 8 8 11 11 11 11 Al ₂ O ₃ (wt%) One One One One One One CTE (占 10 ^-7 / 占 폚) 87.3 92.3 88.4 90.8 87.1 90.4 Transfer point (캜) 460 440 450 450 460 460 Softening point (℃) 500 480 480 480 500 490

The CTE is a coefficient of thermal expansion. The CTE of the glass frit powder is baked to 500 ° C. and cut into a 5 × 5 × 40 mm sintered body. The CTE is then diluted at room temperature with a dilatometer The thermal expansion coefficient at around 30 to 300 ° C was obtained from the curve obtained when the temperature was raised at a rate of 0 ° C / min. The transition point at which the curve obtained increased rapidly was measured as a softening point (Td Ts: a softening point on the dilatometer) .

That is, since the color coating composition used in the present invention undergoes a high-temperature molding process, it is necessary to keep the color coating component properly adhered to the color coated glass which is fired at a high temperature (above 500 캜).

Therefore, as shown in Table 1, the glass frit is formed as a component that can meet the temperature condition. At a high temperature condition (temperature above the temperature at which the organic binder is removed, the organic binder of the present invention is removed in the form of evaporating at 450 ° C or more ), So that it is possible to maintain the attached state on the glass surface, such as ceramic fillers and inorganic pigments that adjust the turbidity and transmittance.

In particular, the temperature distribution of group a, group c, and group f except for group b is ideal, and group c can be set to an ideal condition satisfying both the thermal expansion coefficient, transition temperature, and softening point. It is a matter of course that it is possible to cope with various composition ratios of the respective production groups in various ways, since the manufacturing conditions are maintained to a satisfactory degree depending on the use conditions.

The color coating composition used in the present invention was tested based on the composition ratio of the glass frit.

Component Experimental group (wt%) One 2 3 4 5 6 7 8 Organic binder solution 40 40 40 40 40 40 40 40 Glass frit (c) 48 48 50 48 57 50 48 52 CaCO ₃ 12 CaO 12 CaF ₂ 10 SiO ₂ 12 TiO ₂ 3 MgO 10 Al ₂ O ₃ 12 ZnO 8

As shown in Table 2, the components of the ceramic filler were differently formed on the basis of the organic binder and the oil-lift (group c) in each example.

[Experimental Example 1]

On the basis of the above Table 2, transparent glass tubes of an intaglio type and a bulb type were prepared and coated in a thickness of 10 탆 by dipping or spraying in each glass tube, and then the glass tube was raised from room temperature to 570 캜 at a rate of 5 캜 / And the specimens were cooled.

Color coated specimens were prepared by applying the coating solution shown in Table 3 below on the prepared specimens.

The prepared specimens were measured for turbidity and transmittance using an NSK5000 model of NIPPON DENSOHKU, which is a device based on JIS K 7136 (ISO 14782) and JIS K 7361 (ISO 13468). Here, the visible light used in the measurement of transmittance uses a wavelength of 555 nm in the visible light region. The measured values are shown in Table 4 below.

Component Example (wt%) One 2 3 4 5 6 7 8 Organic binder solution 50 50 50 50 50 50 50 50 Glass frit (c) 41 40 39 44 43 42 42 41 Ceramic filler 8 8 8 5 5 5 4 4 Inorganic pigments Red (CI Pigment Red 108) One 2 3 One 2 3 4 5

Table 3 shows a color coating solution prepared by mixing glass frit (group c), ceramic filler and inorganic pigment in different binder ratios in an organic binder solution.

Character rating One 2 3 4 5 6 7 8 Haze 83.93 84.10 84.55 71.85 72.70 73.52 72.42 74.67 Parallel transmittance 11.26 10.86 10.12 22.12 21.35 20.57 20.44 21.52 Diffusion transmittance 58.79 57.45 55.38 56.45 56.85 57.12 57.22 57.12 Total transmittance 70.05 68.31 65.50 78.57 78.20 77.69 78.13 75.15

As shown in Table 4, the glass frit was formed into the group of Production Example c, and the contents of the ceramic filler and the content of the inorganic pigment were varied to observe the total transmittance and the haze value characteristics according to the change. As a result, Of the total amount of ceramic filler is 8 wt%, which is the best result regardless of the content of inorganic pigment.

Therefore, to control the content of the ceramic filler to 8 wt% and to express various colors, experiments were conducted under the same conditions as those of the above coating solution and coating test specimen by varying kinds of inorganic pigments.

[Experimental Example 2]

In this experimental condition, the same equipment as in Experimental Example 1 was used, and the thickness of the coating on the glass surface was increased to 20 탆.

division Comparative Example One 2 3 4 5 Organic binder solution 50 50 50 50 50 Glass frit (c) 40 39 39 39 39 Ceramic filler 10 8 8 8 8 Inorganic pigments C.I. Pigment Red 108 - 3 - - - Cadmium zinc sulfide - - 3 - - C.I. Pigment Green 50 - - - 3 - C.I. Pigment Blue 28 - - - - 3 Color White Red Yellow Green Blue characteristic Haze (%) 85.90 84.55 84.64 83.24 81.73 Parallel transmittance (%) 9.25 10.12 10.06 11.15 12.36 Diffuse Transmittance (%) 56.36 55.38 55.42 55.36 55.28 Total Transmission (%) 65.61 65.50 65.48 66.51 67.64

As shown in Table 5, in Comparative Examples 1 to 5, the results of the satisfaction level above the use standard as the lighting material are shown. When the content of the ceramic filler is fixed and the content of the inorganic pigment is constant, It is possible to obtain a very desirable result.

Based on Experimental Example 2, it can be seen that the transmittance and turbidity of the color coating composition applied to glass can be adjusted by adjusting the softening point through the composition of the glass frit used in the present invention.

Therefore, when the glass surface is coated using the composition of the present invention, both the turbidity and the transmittance can be satisfactorily attained to a desired level, and the composition, composition ratio and coating thickness of the glass frit and ceramic filler The turbidity and the transmittance can be changed and used so that it is possible to cope with various conditions desired by the user.

In addition, in order to realize various colors in addition to glass frit and ceramic filler, an inorganic pigment is included so that color coated glass of various colors can be manufactured as shown in FIG. 7 and FIG.

Coated glass using the coating composition for an LED light diffuser of the present invention, wherein the coated glass is coated with the coating composition at a thickness of 10 to 20 mu m.

The coated glass may be raised from room temperature to 570 ° C at a rate of 5 ° C per minute and then held for 5 minutes and then cooled and cured, but preferably raised to 500 ° C. This is because, as described above, when the compositions used as the organic binder solution are vaporized or evaporated at 450 DEG C and the heat distortion temperature of the glass is about 620 DEG C, the plastic heat treatment is performed at a temperature level sufficient to remove the organic binder solution So as to increase the energy efficiency due to the temperature rise.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. There is no doubt that it is within.

110, 120: LED light
111, 121: transparent glass tube
112, 122: Base
114, 124: substrate
116: diffuser
115, 125: LED

Claims (14)

A color coating composition for an LED light diffuser,
Wherein the color coating composition is formed by mixing a binder solution, a glass frit, a ceramic filler, and an inorganic pigment at a predetermined ratio, respectively. The color coating composition of claim 1,
Wherein the binder solution, the glass frit, the ceramic filler and the inorganic pigment are mixed in an amount of 50% by weight, 40 to 44% by weight, 5 to 8% by weight and 1 to 3% by weight, respectively, Composition. 3. The method of claim 2,
Wherein the inorganic pigment is selected from the group consisting of CI Pigment Red 108, Cadmium zinc sulfide, CI Pigment Green 50, and CI Pigmert Blue 28. The method of claim 3,
Wherein the inorganic pigment is mixed in an amount of 1 to 5 wt% each. 3. The method of claim 2,
Wherein the binder solution comprises an organic binder and a solvent. 6. The method of claim 5,
Wherein the organic binder is one selected from the group consisting of nitrocellulose, acryl resin and ethyl cellulose, and the solvent includes at least one selected from among toluene, acetone, isobutyl acetate, butyl cellosolve and xylene Color coating composition for LED light diffuser. 3. The method of claim 2,
Wherein the color coating composition is composed of silicon dioxide, boron oxide, zinc oxide and barium oxide as main components of the glass frit. 8. The method of claim 7,
Wherein the main components of the glass frit are each composed of 9 to 17% by weight, 18 to 20% by weight, 41 to 46% by weight and 9 to 17% by weight, respectively. 9. The method of claim 8,
Wherein the glass frit further comprises one or more selected from the group consisting of potassium oxide, sodium oxide and aluminum oxide having a composition ratio of 1 to 11% by weight. 3. The method of claim 2,
Wherein the ceramic filler comprises any one selected from calcium carbonate, calcium oxide, calcium fluoride, titanium dioxide, silicon dioxide, zinc oxide, aluminum oxide and magnesium oxide. 11. The method of claim 10,
Wherein the ceramic filler is included in an amount of 8 to 12 wt% based on the composition of the organic frit. A color coated glass characterized by being coated with a color coating composition for an LED light diffuser of any one of claims 1 to 11. 13. The method of claim 12,
Wherein said coated glass is coated with a coating composition between 10 and 20 mu m. 14. The method of claim 13,
Wherein the color coated glass is raised from room temperature to 500 to 600 ° C at a rate of 5 ° C per minute and then held for 5 minutes and then cooled and cured.

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